Humidifier attachment



June 15 1926.

` 1,588,491 O. P. NYSTROM HUMIDIFIER ATTACHMENT Filed Feb. 24. 1925 June 15 1926. 1,588,491 o. P. NYsTRoM HUMIDIFIER ATTACHMENT Filed Feb. 24, 1925 2 sheets-sheet 2 Patented June 15, i926.

UNITED stares -arsi\ir orifice.

OSCAR P. NYSTRQJE, OF HCLLAND, MICHIGAN, A SSIGNOE TO HOLLAND -FURNACE COMPANY. 0F HOLLAND, MICHIGAN, A. CORPORATION OF MICHIGAN.

HUMDIFIER ATTACHMENT.

Application filed February 24, 1925. Serial No. 11,081.

This invention relates to a humidifier attachment which maj,7 be applied to furnaces. The attachment is designed to be applied yat the upper side of a front or forward eX- tension to the ash pit casting being adapted for application to furnaces already installed and in use or, if it is desired, to furnaces which are being installed, though, preferably, for new furnaces the humidifier will be made as an integral part of the ash pit casting in accordance with the disclosure of my pending application for patent, Serial No. 722.186, filed July 2l, 1924.

It is a primary object and purpose of the present invention to provide aseparable humidifier attachment in the form of a shallow receptacle, which preferably though not necessarily, is divided transversely into a number of compartments having transverse ribs,

the bottom of the receptacle inclining downwardly and inwardly so that a limited quantity of water may be held in front of eachr transverse rib level with its upper edge overflowing the top thereof when more water is added. The lowermost compartment of the receptacle is provided with a drainage openf ing near its uppermost portion and when the water reaches a certain level in the lowermost compartment any additional water is drained through the drainage opening into the ash pit of the furnace. The water thus drained is absorbedby the ashes dampening the same. eliminating dust and meistening the air passing to the burning fuel, all of which is of great operation.

A still further ob] ect of the invention is to provide a means in conjunction with the drainage opening to the ash pit either with advantage in furnace the separable receptacle or the humidier cast integral with the furnace ash pit where' by gases, which might pass through said opening from the ash pit to the space enclosed by the outer casing of the furnace, are trapped and held from mixing with the air in such space. It is understood that the air within the space enclosed by the outer casing of the furnace'is heated and passes to the several rooms of the house or other building heated by the furnace and this trapping of gas is desirable in order that it shall not mix with the air going to rooms of a dwelling, office or the like. l

A still further object vof the inventionis to provide a humidifier, with or without the cross ribswhich divide it into compartments,

which occupies very little space at the upper side of the forward extension to the ashpit and with a removal of the vbulky waterpan ordinarily used, thisV being of advantage in eliminating all obstructions to free circulation of the heated air which is delivered from the furnace.

Various other objectsand purposes than Y those stated together with novel constructions for the attaining of the same will appear with an understanding of the invention had from the following description taken in connection with the accompanying drawings, in which- Fig. 1 is a fragmentary vertical section vthrough the lower forward lportion of a furnace equipped with my invention. y

Fig. 2 is a fragmentary horizontal section taken through the furnace in a plane above the humidifier.

Fig. 3 is a perspective view of the separable humidifier receptacle or tray, showingl the preferred form thereof used.

Fig. 4 is a fragmentary .enlarged vertical section through the trap whichis formed as an integral part of the tray or receptacle construction.

Fig. 5 is a view similar to Fig. 4, illus; trating a slightly different form of construcvtion wherein the trap is provided byy means of a separately cast element which may be applied to the water holding receptacle.

Fig. 6 is a view similar to Fig. 5 illustrating the application of the trap to a humidifier wherein its structure is formed integral with the top of the forward extension to the ash pit, an v Fig. 7 is a fragdrmentary enlarged section illustrative of a different form of gas trapV which may be used, though that vertical 'Y shown in Figs. 3 to 6 is a preferred construction. f

Like reference characters refer to like parts in the different figures of thedrawings.

The furnace, in its construction, includes an ash pit casting l above which is the re pot casting supported by and resting on the ash pitl casting with the usual furnace grate between. The ash pit casting at its front side is provided with a forward extension havingspaced apart substantially vertical sides 3 connected at their upper edges by an extension tto." th'e ash pit, comprising vthe jing# 1'? "is inadef 1 integral cross member or top7 preferably formed A with; a relatively-short horizontal forward section '4C 'from which a. wider downwardly and inwardly inclined section. 5. e2;-` ten-ds.` In the construct?.on;.etv the ashwpitan upwardly extend-ing; bossv 6'. is formed and I the same is shown vthough it comprises no essential or necessary feature o theini'ene tion in any way, being in practice used as a y means for connectingheolsuqopoit (not shown) for thel rod used to operate the grate.

The inner heater structureorn they furnace is surrounded I.byt an outer` enclosing ca spaced thereiroin which includes a`r front plaite-'o'f fcastnietal andy al sheet metal druin 7ar whichfcompletes-the enclosure of the ti`n v nacez The' cast A'meta-l5plate 7y 'at-1 the. -ront' isY usedi for the mount-ing' or* the various#furL nace-f doors one-oflfwhioh, indicatedat 8, is-

use-d at the front of the ash pi'tland through Y n the Y opening norm-ally closedv f by whichA the asheslinay befremoved troni-'fthe ash pit.

0n the upperlside'A or `top ofi* the'- forwardtions #4l and??5;'thefhumidier1tray construe vtio'n'of" my invention issadapted s'to bie/placed; It is formed as a single castinghalvingga bottoinfw'ith sections=9anda1()confriningto vand dying directly over the seetionsd'land 15 1 of the ash pitlextensiona Atfeach side edge ribs'11-1'extendupwardlyl for; short distances.

Theseri'ls@ are' integra-1T with andconneetedf vby an outer or front rib 12 curved "tor-corre-l spond' tothe' curvature-olif" the plate7and lying# against f the inner' sidev there'ofli.'i Y At their inner endseribsv 11" are #connected 'by 'va spacedj a short distance -frointhe *wallsV of?v theffre'fpot casting 25' The humidifier can be used withfonly ythe bottom :andnsual border ribs-11ia 12 'an-d'1?,

but lTpreertoz divide thespace enclosed intolcoInpartrnents4 castinggcr'oss ribs- 141- and 15' integral-l with thel tray-v to lie` between the-- side ribs-11-thereo'finspaced laparti-relationY Ainupvxfardlyfvr pro] ect-ingv ringff 16 f "is formed with th'eftrayi for thereoeption o'ttlie bossV heretoforei de'seribe'd.-A The tray f when 'placed onfthe-to-p'- 1t-hef ash-`r prtfextension; is located properly in position by the bossl-Gipassing# through; the :lili-'012163 In`r i addition-f1 anopenn the sect-"ronnj oi fthe topf froinwhichafgroowe 18, forme lin-'thevunder side-of gsaidfseetion glextends downwardly toj the inner edge of the top of the ashwpitifer tension; find -a dug 19lwithlf an opening 20 therethrough fis connectedwith randextends dow/nwar'dlyi vfronerrth'e'bottom section 10.? of the tray@v bein gi adapted `to enter",the' opening 1 lfand-f iaiddinathfeproper' 'positioningj 'oflfthe'y waterfholdingf tray or3 receptacle.l onath'e ash?- pite front extension:-Vv Th'e :lug 15k vvitlutheopening;y 20' therethrougli is positioned. sos' that! said opening*d lics direetlyfV 'backs oit l the lowerf cross ribi 15 fand :'at ansupperniost point of the lower compartment of the tray or receptacle. t

Itis evident-*thataiiter wateris .delivered to thetfront receptacle or the tray between therontrib` 12 and the front 'cross rib 141-, 70V

as the-upper,T edge orv the rib'- 1lb lies in a plane lower than the. upper edges of the side ribsfv 121i andi', the Vfront rib 12, when this compartment Ihas been' filled to the level of tli'eulirperiedgef oftheY cross rib legitv over- 75 flows into the next compartment between cross ribs 14- and15.- rlfliis compartment Willibe-illeduntil the level-ofthe" upperV edge/o the crosslrib15 is reached, where-v upon-it overfiowsintof-the lowerinost coinof constructionfiorf this purpose is shown said-opening' f-ronrthe ash pit 90 Wlierein the' rib* 155A` adfacent thel openingl 20A 95 is slightly increased I ins kheight and; integral' therewith7 ahousinggis cast'fcomprisinga top; 21; sides 22 and alrinnerqside ',orr'bacl 23' with1 anffopeiiiiig:v 24 at' the vlower edge Aoflv'the` b'acl A'23" wherebyn water' in'A the: lower com;l p'artnient' may` passfintofthe' yinterior ofth'e housing'. and thence'to the opening 20` for drainage? Afny gasesipassingfronithe ash pit through the@ opening 20' are trapped`vwith-inthe liousinggfthus made and: cannot: 1 Y escapefitl'irough'the opening-'24; as' thisV opening'is submerged atallftimes whenxth'ereis water 1nr thelower compartment* oft the water holding tray or' receptacle;

Instead lofiniairingv this housing structure V1 10 integral-with the'tray'it can bennade asa separatemember with atop 21a, sidesZQa" and jginnerrsidei orbac'k 233i at theA lower ledge olifwhichthe:opening` 24a Correspending to. openingllin*t'hestructure shown: in Fig. tv is"'-inf ide; The-'top' 2'1"P`at,- its fronted-ge is formed'lwith a'lroolr port-ion "25 .to-hookn over the-upperedne of 'the cross rib 15 as shown iii-Fig: 55'

This to "all practical intents: andf Y purposesproyidesfaa liousingtrap for gases' 120 romthe ash; pitlwhichare trappedin the n saine manner'as' described with reference to,-

It isrfevident that this' construction shown inf Fig. 5 may: be applied* to humidierswherein' the vsideI` and cross' ribs are-cesti integral with the uppe:`v sidev ory top" connect'- ing theVertical-sidesfofthe ash pit 'forward extension. This is indicated in' Fi'g-.'d'whereinn ther Yseparable 'housing4 trap; identical with that shown in Fig. 5 and heretofore described, is hooked over the rib 15a cast integral with the inclined section 5 of the top to the ash pit forward extension; and

Vof course the integral construction shown in Fig. et could be applied thereto quite as well.

In Fig. 7 a still further form of trap is shown wherein the water drained through the opening 2O passes into a goose neck 26 formed in a drain pipe 27 which lies below the part 5. This downwardly curved trap portion 26 in the pipe 27 is an old and well known means used for trapping against the passage of dangerous gases, being used to a large extent in plumbing to prevent the passage of sewer gases; and it works in the relation 'here described upon the same principle. However the constructions shown in Figs. l to 6 inclusive are preferred for the reason that this pipe 27, having a small passage therethrough, is liable to become plugged up, filling with sediment and thus stopping the drainage of water to the ash pit.

tray or receptacle through av spout 28, the inner end of which lies directly over the front compartment of the humidifier while the outer end extends-through the front plate 7 in position so that water may be supplied continuously from any suitable source substantially as indicated in my application for patent to which reference has been made.

The construction described is very simple, economical to produce, easily applied by unskilled labor and has no parts to get out of order. The bulky water pan heretofore use with huinidifiers is eliminated, a large evaporating surface is provided with a consequent greatly increased evaporation of water and dissemination thereof through the heated air passing from the furnace. lThe water is supplied continuously, the greater portion thereof being evaporated and such part as is not evaporated is drained into the ash pit moistening the ashes and eliminating all dust therefrom. This construction for furnaces installed and in use is particularly useful and has so proved in practice. The invention is defined in the appending claims and is to be considered as comprehensive of all forms of structure coming within their scope.

I claim:

l. In a furnace, an ash pit casting of substantially cylindrical form provided at its front sidc with an outwardly extending portion, comprising spaced apart vertical sides and a downwardly and inwardly inclined top connecting said vertical sides at their upper edges, said top having an opening therethrough, a tray formed with a downwardly and inwardly inclined bottom, and ribs cast integral therewith at its edges and extending upwardly, said tray resting on The water is supplied to the humidifier the top of the forward extension to the ash pit casting, a boss jon the under side of the bottom of the trayadapted to tin the opening in said top ofthe ash pit extension, saidV ,70

its front side with an outward extension,-

comprising spaced lvertical sides and a downwardly and inwardly inclined top con-L necting said vertical sides at their upper edges, said top having an opening therethrough between its uppermost and lowermost points, a tray comprising a downwardly and inwardly inclined bottom and vertical ribs integral with the bottom and eX- tending upwardly therefrom at its edges, a boss formed integrally with the bottom of the tray at its under side adapted to pass into the opening in the top of the ash pit extension, said boss and bottomk having an opening therethrough, whereby when water reaches a predetermined llevel in the tray, the opening serves as a drainage passage for additional water to carry the same to the ash pit, and means associated with said opening into which water may pass for preventing the upward passage of gases from the ash pit into the space above the tray, substantially as described.

3. In a furnace, an ash pit casting of substantially cylindrical form provided at its front side with an outward extension, comprising spaced vertical sides and a downwardly and inwardly inclined top disposed between and cast integral with said sides, means whereby a limited quantity of water may be held at the upper side of said top, said top having an opening therethrough to drain excess of water into the ash pit, and means associated with said opening into which water may pass to prevent the passage of gases from the ash pit'through the opening into the space above said ash .pit forward extension, substantially as described.

4. In a furnace, an ash pit casting of substantially cylindrical form provided at its front side with an outward extension, comprising spaced vertical sides and a downwardly and inwardly inclined top integral with and connecting the upper edges of said sides, a water holding tray comprising a downwardly and inwardly inclined bottom and upwardly extending ribs at its edges located on the top of said forward extension to the ash pit, said tray and bottom having openings therethrough in conjunction with each other at points between the uppermost and lowerinost points of said tray and bottom, and a housing over said opening in the tray comprising front and rear sides and spaced lateral sides and a top over said sides, said rear side of the housing being formed with an opening at its lower edge, substan` i'ont Sdfwh an: ontwardyextensonl, comiF p-rlsmg; Spacedf Verhaal sld-es'nnd a; down- 'Wzwdly mdf inwardly inclined 'mceglalv top?v conuectmgf; tlef verblcal: sldes: at( than upper edges,-M saidx top. having? anv opening? thereithloughi bet-Ween' `lts uppenmostl and; Y lower.`

"most ;ponts-,. am aten 'holding tray comprising adownwardly .audrmwardly .111011115361bottomV r and. vertical rb's integral with wndvextendng; upwardly from the'bottom atfts-'edges-.sadi

bottom' of: the .tray having', m opening therequantity 0i" Water to lthe tray., substantially as* desoribed...

@SGAR P. NY-STRQ'M; 

